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style: Skip state pseudo-classes when finding a pseudo-element.

Browse source 
Bug: 1391577
Reviewed-by: heycam
MozReview-Commit-ID: 1ICBijtcf2b
This commit is contained in:
Emilio Cobos Álvarez 2017-08-20 09:01:12 +02:00
parent c1b196b7cb
commit 9e0dd19e7e
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1 changed files with 14 additions and 1 deletions
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15
components/style/invalidation/element/invalidator.rs
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@ -595,14 +595,27 @@ impl<'a, 'b: 'a, E> TreeStyleInvalidator<'a, 'b, E>
matched = true;
if matches!(next_combinator, Combinator::PseudoElement) {
// This will usually be the very next component, except for
// the fact that we store compound selectors the other way
// around, so there could also be state pseudo-classes.
let pseudo_selector =
invalidation.selector
.iter_raw_parse_order_from(next_combinator_offset - 1)
.skip_while(|c| matches!(**c, Component::NonTSPseudoClass(..)))
.next()
.unwrap();
let pseudo = match *pseudo_selector {
Component::PseudoElement(ref pseudo) => pseudo,
_ => unreachable!("Someone seriously messed up selector parsing"),
_ => {
unreachable!(
"Someone seriously messed up selector parsing: \
{:?} at offset {:?}: {:?}",
invalidation.selector,
next_combinator_offset,
pseudo_selector,
)
}
};
// FIXME(emilio): This is not ideal, and could not be